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Lesson 38 acidic adj. 酸的，酸性的 alcohol n. 酒精 bactericidal adj. 杀菌的 carbonated adj. 碳化的，碳酸的 contamination n. 污染 disinfectant n. 消毒剂 ethanol n. 乙醇 intermittent adj. 间歇的，断断续续的 leakage n. 泄

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furthermore ad.而且，此外 furthest a. 最远的,最遥远的 fuse n.保险丝，导火线 future n.将来，未来 gain vt.vi.获得 n.利益 gallery n.长廊，游廊；画廊 gallon n.加仑 ga